/*内容居中*/
html,body {
    height:100%;
}
body h1 {
    text-align:center;
}
/*盒子样式*/
.selector {
    position:absolute;
    left:17%;
    bottom:43%;
    width:80px;
    height:80px;
    margin-top:-70px;
    margin-left:-70px;
}
/*按钮*/
.selector,.selector button {
    font-family:'Oswald',sans-serif;
    font-weight:300;
}
.selector button {
    position:relative;
    width:70%;
    height:70%;
    padding:10px;
    background:#428bca;
    border-radius:50%;
    border:0;
    color:white;
    font-size:20px;
    cursor:pointer;
    box-shadow:0 3px 3px rgba(0,0,0,0.1);
    transition:all .1s;
}
.selector button:hover {
    background:#3071a9;
}
.selector button:focus {
    outline:none;
}
/*按钮结束*/
/*菜单*/
.selector ul {
    position:absolute;
    list-style:none;
    padding:0;
    margin:0;
    top:-20px;
    right:-20px;
    bottom:-20px;
    left:-20px;
}
.selector li {
    position:absolute;
    width:0;
    height:100%;
    margin:0 50%;
    -webkit-transform:rotate(-360deg);
    transition:all 0.8s ease-in-out;
}
.selector li input {
    display:none;
}
.selector li input + label {
    position:absolute;
    left:50%;
    bottom:100%;
    width:0;
    height:0;
    line-height:1px;
    margin-left:0;
    background:#fff;
    border-radius:50%;
    text-align:center;
    font-size:1px;
    overflow:hidden;
    cursor:pointer;
    box-shadow:none;
    transition:all 0.8s ease-in-out,color 0.1s,background 0.1s;
    z-index:9999;
}
.selector li input + label:hover {
    background:#f0f0f0;
}
.selector li input:checked + label {
    background:#5cb85c;
    color:white;
}
.selector li input:checked + label:hover {
    background:#449d44;
}
.selector.open li input + label {
    width:50px;
    height:50px;
    line-height:80px;
    margin-left:-40px;
    box-shadow:0 3px 3px rgba(0,0,0,0.1);
    font-size:14px;
    z-index:9999;
    max-width: none;
}

.selector.open li input + label a {
    text-decoration:none;
    color:#000;
}